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Registro Completo |
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
13/11/2020 |
Data da última atualização: |
13/11/2020 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
VERGANI, G. B.; FONSECA, J. F. da; TREVIZAN, J. T.; PEREIRA, V. S. do A.; GARCIA, A. R.; GARCIA, A. R.; BRANDÃO. F. Z.; SOUZA-FABJAN, J. M. G.; OLIVEIRA, M. E. F. |
Afiliação: |
GABRIEL BRUN VERGANI; JEFERSON FERREIRA DA FONSECA, CNPC; JULIANE TERAMACHI TREVIZAN; VERONICA SCHINAIDER DO A PEREIRA, CPPSE; ALEXANDRE ROSSETTO GARCIA, CPPSE; ALEXANDRE ROSSETTO GARCIA; FELIPE ZANDONADI BRANDÃO; JOANNA MARIA GONÇALVES SOUZA-FABJAN; MARIA EMILIA FRANCO OLIVEIRA. |
Título: |
Luteotropic effects of human chorionic gonadotropin administered 7.5 days after synchronous estrous induction in Morada Nova ewes. |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
Animal Reproduction Science, v. 223, article 106644, Dec. 2020. |
DOI: |
https://doi.org/10.1016/j.anireprosci.2020.106644 |
Idioma: |
Inglês |
Conteúdo: |
Abstract: This study was conducted in ewes to assess effects of human chorionic gonadotropin (hCG) administration after imposing an estrous induction treatment regimen. Ewes (n = 115) were treated with a 60 mg medroxyprogesterone-intravaginal-sponge for 6 d plus 200 IU of equine chorionic gonadotropin (eCG) im and 37.5 ?g d-cloprostenol im 36 h before sponge removal (Day 0). After natural mating, ewes having at least one corpus luteum (CL; n = 108) were administered either 1 mL of saline (G-Control; n = 53) or 300 IU of hCG (G-hCG; n = 55) on Day 7.5 after sponge removal (Day 0). Ovarian ultrasonography and blood collection were performed on Days 7.5, 13.5, 17.5, 21.5, and 30.5. Accessory CL (aCL) were observed in 81.5 % (G-hCG) and 0.0 % (G-Control) of ewes (P = 0.0001). Diameter, area, and volume of luteal tissue were greater (P < 0.05) in G-hCG from Day 13.5 to 30.5. Progesterone (P4) concentrations were greater (P < 0.05) on Days 13.5, 17.5, 21.5 and 30.5 for ewes of the G-hCG group. Pregnancy percentage was similar (P = 0.25) between groups [47.1 % (G-control) compared with 60.0 % (G-hCG)], although total number of lambs produced by estrous synchronized ewes was greater (P = 0.005) in ewes of the G-hCG group (90.9 % compared with 66.0 %). In conclusion, hCG administration 7.5 days after sponge removal from Morada Nova ewes during the non-breeding season is an effective treatment to induce aCL formation, improve luteal tissue biometry and P4 concentrations, and to enhance the total number of lambs born. MenosAbstract: This study was conducted in ewes to assess effects of human chorionic gonadotropin (hCG) administration after imposing an estrous induction treatment regimen. Ewes (n = 115) were treated with a 60 mg medroxyprogesterone-intravaginal-sponge for 6 d plus 200 IU of equine chorionic gonadotropin (eCG) im and 37.5 ?g d-cloprostenol im 36 h before sponge removal (Day 0). After natural mating, ewes having at least one corpus luteum (CL; n = 108) were administered either 1 mL of saline (G-Control; n = 53) or 300 IU of hCG (G-hCG; n = 55) on Day 7.5 after sponge removal (Day 0). Ovarian ultrasonography and blood collection were performed on Days 7.5, 13.5, 17.5, 21.5, and 30.5. Accessory CL (aCL) were observed in 81.5 % (G-hCG) and 0.0 % (G-Control) of ewes (P = 0.0001). Diameter, area, and volume of luteal tissue were greater (P < 0.05) in G-hCG from Day 13.5 to 30.5. Progesterone (P4) concentrations were greater (P < 0.05) on Days 13.5, 17.5, 21.5 and 30.5 for ewes of the G-hCG group. Pregnancy percentage was similar (P = 0.25) between groups [47.1 % (G-control) compared with 60.0 % (G-hCG)], although total number of lambs produced by estrous synchronized ewes was greater (P = 0.005) in ewes of the G-hCG group (90.9 % compared with 66.0 %). In conclusion, hCG administration 7.5 days after sponge removal from Morada Nova ewes during the non-breeding season is an effective treatment to induce aCL formation, improve luteal tissue biometry and P4 concentrations, and to enhanc... Mostrar Tudo |
Palavras-Chave: |
Accessory corpora lutea; HCG; Luteal vascularization; Oestrous cycle; Ovarian ultrasonography. |
Thesagro: |
Ciclo Estral; Corpo Lúteo; Ovino; Progesterona; Reprodução Animal. |
Thesaurus Nal: |
Animal reproduction; Estrous cycle; Progesterone; Sheep. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 02749naa a2200397 a 4500 001 2126601 005 2020-11-13 008 2020 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.anireprosci.2020.106644$2DOI 100 1 $aVERGANI, G. B. 245 $aLuteotropic effects of human chorionic gonadotropin administered 7.5 days after synchronous estrous induction in Morada Nova ewes.$h[electronic resource] 260 $c2020 520 $aAbstract: This study was conducted in ewes to assess effects of human chorionic gonadotropin (hCG) administration after imposing an estrous induction treatment regimen. Ewes (n = 115) were treated with a 60 mg medroxyprogesterone-intravaginal-sponge for 6 d plus 200 IU of equine chorionic gonadotropin (eCG) im and 37.5 ?g d-cloprostenol im 36 h before sponge removal (Day 0). After natural mating, ewes having at least one corpus luteum (CL; n = 108) were administered either 1 mL of saline (G-Control; n = 53) or 300 IU of hCG (G-hCG; n = 55) on Day 7.5 after sponge removal (Day 0). Ovarian ultrasonography and blood collection were performed on Days 7.5, 13.5, 17.5, 21.5, and 30.5. Accessory CL (aCL) were observed in 81.5 % (G-hCG) and 0.0 % (G-Control) of ewes (P = 0.0001). Diameter, area, and volume of luteal tissue were greater (P < 0.05) in G-hCG from Day 13.5 to 30.5. Progesterone (P4) concentrations were greater (P < 0.05) on Days 13.5, 17.5, 21.5 and 30.5 for ewes of the G-hCG group. Pregnancy percentage was similar (P = 0.25) between groups [47.1 % (G-control) compared with 60.0 % (G-hCG)], although total number of lambs produced by estrous synchronized ewes was greater (P = 0.005) in ewes of the G-hCG group (90.9 % compared with 66.0 %). In conclusion, hCG administration 7.5 days after sponge removal from Morada Nova ewes during the non-breeding season is an effective treatment to induce aCL formation, improve luteal tissue biometry and P4 concentrations, and to enhance the total number of lambs born. 650 $aAnimal reproduction 650 $aEstrous cycle 650 $aProgesterone 650 $aSheep 650 $aCiclo Estral 650 $aCorpo Lúteo 650 $aOvino 650 $aProgesterona 650 $aReprodução Animal 653 $aAccessory corpora lutea 653 $aHCG 653 $aLuteal vascularization 653 $aOestrous cycle 653 $aOvarian ultrasonography 700 1 $aFONSECA, J. F. da 700 1 $aTREVIZAN, J. T. 700 1 $aPEREIRA, V. S. do A. 700 1 $aGARCIA, A. R. 700 1 $aGARCIA, A. R. 700 1 $aBRANDÃO. F. Z. 700 1 $aSOUZA-FABJAN, J. M. G. 700 1 $aOLIVEIRA, M. E. F. 773 $tAnimal Reproduction Science$gv. 223, article 106644, Dec. 2020.
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10. | | LEUCHTENBERGER, C.; RIBAS, C.; MAGNUSSON, W.; MOURAO, G. de M. To each his own taste: latrines of the giant otter as a food resource for vertebrates in Southern Pantanal, Brazil. Studies on Neotropical Fauna and Environment, v. 47, n. 2, p. 81-85, August, 2012.Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
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18. | | LEUCHTENBERGER, C.; RHEINGANTZ, M. L.; ZUCCO, C. A.; CATELLA, A. C.; MAGNUSSON, W. E.; MOURAO, G. Giant otter diet differs between habitats and from fisheries offtake in a large Neotropical floodplain. Journal of Mammalogy, v. 101, n. 6, p. 1650-1659, dec. 2020.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
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